Only to certain plants. Specifically, the tree exerts an allelopathic effect on surrounding vegetation. That effect actually is a germination inhibitor, which keeps plants from maturing into attractive, healthy plants. But they are not poisonous for humans.
23:41, 14 December 2011
Cyperus esculentus (also called chufa sedge, nut grass, ...
Scotch thistle is a biennial plant with thorny leaves, ...
Though varying considerably in appearance, these species ...
Tacinga is a genus in the cactus family Cactaceae, native ...
Solidago species are perennials growing from woody caudices ...
Pancratium illyricum is a species of bulbous plant native ...
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